/**
 * ============================================================================
 * EPIGRAF — QUIET ARCHIVE DESIGN SYSTEM
 * ============================================================================
 *
 * Scandinavian clarity meets Japanese restraint meets editorial rigor.
 *
 * ============================================================================
 */

/* ============================================================================
   FONTS — Self-hosted Geist
   ============================================================================ */

@font-face {
  font-family: "Geist";
  src: url("/fonts/Geist-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Geist";
  src: url("/fonts/Geist-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Geist";
  src: url("/fonts/Geist-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Geist Mono";
  src: url("/fonts/GeistMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ============================================================================
   VARIABLES
   ============================================================================ */

:root {
  /* Colors — OKLCH neutrals */
  --color-paper: oklch(0.96 0 0);
  --color-ink: oklch(0.20 0 0);
  --color-ink-secondary: oklch(0.42 0 0);
  --color-ink-tertiary: oklch(0.52 0 0);
  --color-rule: oklch(0.82 0 0);
  --color-surface: oklch(0.93 0 0);
  --color-accent: oklch(0.55 0.12 75);
  --color-accent-muted: oklch(0.55 0.06 75);

  /* Typography */
  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, monospace;

  /* Scale */
  --text-body: 0.9375rem;
  --text-micro: 0.75rem;
  --text-small: 0.8125rem;
  --text-title: 1.5rem;

  /* Spacing (4px grid) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;

  /* Layout */
  --max-width: 38rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Dark mode */
[data-theme="dark"] {
  --color-paper: oklch(0.14 0.005 60);
  --color-ink: oklch(0.90 0 0);
  --color-ink-secondary: oklch(0.70 0 0);
  --color-ink-tertiary: oklch(0.50 0 0);
  --color-rule: oklch(0.24 0.005 60);
  --color-surface: oklch(0.18 0.005 60);
  --color-accent: oklch(0.70 0.12 75);
  --color-accent-muted: oklch(0.70 0.06 75);
}

/* ============================================================================
   BASE
   ============================================================================ */

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-feature-settings: "kern" 1;
  line-height: 1.7;
  color: var(--color-ink-secondary);
  background-color: var(--color-paper);
  transition: background-color 0.4s var(--ease-out), color 0.4s var(--ease-out);
}

/* Selection */
::selection {
  background: var(--color-accent-muted);
  color: var(--color-ink);
}

/* Noise texture overlay */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.022;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ============================================================================
   SCROLL PROGRESS
   ============================================================================ */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-ink-tertiary);
  z-index: 10000;
  transition: width 0.1s linear;
}

[data-theme="dark"] .scroll-progress {
  background: var(--color-accent);
}

/* ============================================================================
   LAYOUT
   ============================================================================ */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
}

/* ============================================================================
   THEME TOGGLE
   ============================================================================ */

.theme-toggle {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: 50%;
  color: var(--color-ink-tertiary);
  cursor: pointer;
  transition: color 0.3s, border-color 0.3s, background-color 0.3s, transform 0.3s var(--ease-out);
}

.theme-toggle:hover {
  color: var(--color-ink);
  border-color: var(--color-ink-tertiary);
  background-color: var(--color-surface);
  transform: scale(1.05);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle svg {
  transition: transform 0.4s var(--ease-out), opacity 0.3s;
}

/* Default (light): show moon to switch to dark */
.icon-sun { display: none; }
.icon-moon { display: block; }

[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* ============================================================================
   HEADER
   ============================================================================ */

header {
  margin-bottom: var(--space-12);
}

.logo-mark {
  margin-bottom: var(--space-4);
  color: var(--color-ink);
  cursor: default;
  transition: color 0.5s;
}

.logo-mark svg {
  display: block;
}

.logo-mark svg rect,
.logo-mark svg text {
  transition: stroke 0.5s, fill 0.5s;
}

h1 {
  font-size: var(--text-title);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: var(--space-2);
  transition: color 0.4s;
}

.tagline {
  color: var(--color-ink-tertiary);
  font-size: var(--text-body);
  transition: color 0.4s;
}

.currently {
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-feature-settings: "tnum" 1;
  color: var(--color-ink-tertiary);
  letter-spacing: 0.01em;
  transition: color 0.4s;
}

/* ============================================================================
   SECTIONS
   ============================================================================ */

section {
  margin-bottom: var(--space-12);
}

h2 {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.section-label {
  font-size: var(--text-micro);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-tertiary);
  flex-shrink: 0;
  transition: color 0.4s;
}

h2::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--color-rule);
  transition: background 0.4s;
}

.content p {
  margin-bottom: var(--space-4);
}

.content p:last-child {
  margin-bottom: 0;
}

/* ============================================================================
   PORTFOLIO
   ============================================================================ */

.portfolio-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.portfolio-item {
  border: 1px solid transparent;
  border-radius: 4px;
  transition: border-color 0.3s;
}

.portfolio-item:hover,
.portfolio-item.expanded {
  border-color: var(--color-rule);
}

.portfolio-row {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3);
  background: none;
  border: none;
  font: inherit;
  font-size: var(--text-body);
  color: inherit;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.2s;
}

.portfolio-row:hover {
  background-color: var(--color-surface);
}

.portfolio-row:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
  border-radius: 3px;
}

.portfolio-row--static {
  cursor: default;
}

.portfolio-row--static:hover {
  background-color: transparent;
}

.idx {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-feature-settings: "tnum" 1;
  color: var(--color-ink-tertiary);
  flex-shrink: 0;
}

.idx::before {
  content: "\2116\00a0";
}

.portfolio-name {
  color: var(--color-ink);
  font-weight: 500;
  flex-shrink: 0;
  transition: color 0.4s;
}

.portfolio-item--upcoming .portfolio-name {
  color: var(--color-ink-tertiary);
  font-weight: 400;
}

.portfolio-status {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.portfolio-status[data-status="live"] {
  color: var(--color-accent);
}

.portfolio-status[data-status="dev"] {
  color: var(--color-ink-tertiary);
}

.leader {
  flex: 1;
  min-width: var(--space-4);
  margin: 0 var(--space-1);
  overflow: hidden;
  color: var(--color-ink-tertiary);
  font-size: var(--text-micro);
  letter-spacing: 0.15em;
}

.leader::before {
  content: " \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 \00b7 ";
  white-space: nowrap;
}

.meta {
  flex-shrink: 0;
  color: var(--color-ink-tertiary);
  font-size: var(--text-body);
  transition: color 0.4s;
}

.expand-icon {
  flex-shrink: 0;
  color: var(--color-ink-tertiary);
  transition: transform 0.3s var(--ease-out);
}

.portfolio-item.expanded .expand-icon {
  transform: rotate(180deg);
}

/* Expandable detail — animated height */
.portfolio-detail {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s var(--ease-out);
}

.portfolio-item.expanded .portfolio-detail {
  grid-template-rows: 1fr;
}

.portfolio-detail-inner {
  overflow: hidden;
}

.portfolio-detail-inner p {
  padding: var(--space-2) var(--space-3) var(--space-3);
  color: var(--color-ink-secondary);
  font-size: var(--text-small);
  line-height: 1.7;
}

.portfolio-link {
  display: inline-block;
  margin: 0 var(--space-3) var(--space-4);
  font-size: var(--text-small);
  color: var(--color-ink);
  text-decoration: none;
  position: relative;
  transition: color 0.2s;
}

.portfolio-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.portfolio-link::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease-out);
}

.portfolio-link:hover::after {
  transform: scaleX(1);
}

.portfolio-link span {
  display: inline-block;
  transition: transform 0.2s var(--ease-out);
}

.portfolio-link:hover span {
  transform: translateX(3px);
}

/* ============================================================================
   PRINCIPLES
   ============================================================================ */

.principles {
  list-style: none;
}

.principles li {
  padding: var(--space-2) 0;
  font-size: var(--text-body);
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-rule);
  transition: color 0.4s, border-color 0.4s;
}

.principles li:first-child {
  border-top: 1px solid var(--color-rule);
}

.principle-num {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-feature-settings: "tnum" 1;
  color: var(--color-ink-tertiary);
  margin-right: var(--space-4);
  transition: color 0.4s;
}

/* ============================================================================
   TIMELINE
   ============================================================================ */

.timeline {
  list-style: none;
}

.timeline li {
  display: flex;
  align-items: baseline;
  gap: var(--space-6);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-rule);
  transition: border-color 0.4s;
}

.timeline li:first-child {
  border-top: 1px solid var(--color-rule);
}

.timeline time {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-feature-settings: "tnum" 1;
  color: var(--color-ink-tertiary);
  flex-shrink: 0;
  min-width: 5em;
  transition: color 0.4s;
}

.timeline span {
  color: var(--color-ink-secondary);
  font-size: var(--text-body);
  transition: color 0.4s;
}

/* ============================================================================
   LINKS
   ============================================================================ */

a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--color-rule);
  transition: color 0.2s, text-decoration-color 0.2s;
}

a:hover {
  color: var(--color-ink);
  text-decoration-color: var(--color-ink);
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ============================================================================
   FOOTER
   ============================================================================ */

footer {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-rule);
  transition: border-color 0.4s;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.copyright {
  font-size: var(--text-micro);
  color: var(--color-ink-tertiary);
}

.social-link {
  color: var(--color-ink-tertiary);
  transition: color 0.2s;
}

.social-link:hover {
  color: var(--color-ink);
}


/* ============================================================================
   SCROLL REVEAL
   ============================================================================ */

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ============================================================================
   EASTER EGG
   ============================================================================ */

.logo-mark.easter-egg svg rect {
  stroke: var(--color-accent);
}

.logo-mark.easter-egg svg text {
  fill: var(--color-accent);
}

/* ============================================================================
   FOCUS — Global visible focus for keyboard users
   ============================================================================ */

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 480px) {
  main {
    padding: var(--space-8) var(--space-4);
  }

  .theme-toggle {
    top: var(--space-4);
    right: var(--space-4);
  }

  .portfolio-row {
    flex-wrap: wrap;
  }

  .leader {
    display: none;
  }

  .meta {
    width: 100%;
    margin-top: var(--space-1);
  }

  .timeline li {
    flex-direction: column;
    gap: var(--space-1);
  }

  .principles li {
    font-size: var(--text-small);
  }
}

/* ============================================================================
   PRINT
   ============================================================================ */

@media print {
  body::after,
  .theme-toggle,
  .scroll-progress,
  .expand-icon,
  .copy-hint,
  .copy-confirm {
    display: none !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  body {
    color: #000;
    background: #fff;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}